Swallow Whole (Ex): A dire shark can try to swallow a grabbed opponent of up to one size smaller by making a successful grapple check. Once inside, the opponent takes 2d6+6 points of bludgeoning damage plus 1d8+4 points of acid damage per round from the shark’s digestive juices. A swallowed creature can cut its way out using a light slashing or piercing weapon by dealing 25 points of damage to the shark’s digestive tract (AC 13). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out.